Compression and vacuum relief-valve.



No. 839,912. PATENTED JAN. 1, 1907.

- E. B. WHELAN. I

GOMPRESSION AND VACUUM RELIEF VALVE APPLICATION FILED MARJv 1905.

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4 PATENTEDJAN. 1, 1907.

. E. B. WHBLAN.

COMPRESSION AND VACUUM RELIEF VALVE.

APPLICATION FILED MAR.1.190 5.

QXMMM E UG EN E B. Wll

OF ST. LOUIS MISSOURI.

COMPRES$lON AND V/QCUUM FIELlEF VALVE.

To (Z5 whom it i/mg concern:

Be it known that l, EUGENE B. W'nELAN, a citizen of the United States, residing at St. Louis, State of .llissouri, have invented new and useful lniiproveinents in Compression and. r'ocuunl Relief-Valves, of which the following is specification.

This invention relates to improvements in combined compression and vacuum rclicfvalves for steam-engines; and the obj ctis to provide a simple and ell'ective relief-valve which may be adjusted to admit oil directly from the atmosphere to the cylinder and steam-chest of an engine or to form a by-pess reliet-valve, the improved vulve' being particularly adopted for use in connection with simple engines employing either a piston-- valve or a D slide-valve.

."ith the above object in view the inven Specification of Letters Patent. Application filed March 1, 1905. Serial l l l l tiou consists in the novel features of construction hereinafter fully described, particularly pointel out in the cloin'is, and clearly illustrated by the accompanying drawings, in which" i liigure l is a longitudinal sectional view of a valve constructed in accordance with my invention; Fig. 2, s top plan view; Fig.

vertical sectional view through. the steamchest and aiiiiacent portion of a simple engine of the piston-valve type, showing iny improved v: lvc applied thbreto; Fig. 4, an end elevation of the some; Fig. 5, a side elevation of the rcguleting-cup for the air-inlet of the valve; Fig. (3, a longitudinal sectional view of my valve, showing the arrangement of connections when the valve is used with an en gine using a D slidrvalvc; Fig. 7, a top plan ot the same; and .l ig. 5, a vertical secti nal view through the steam-chest and cylinder of a simple engine of this type, showing m3" *alve attached thereto.

-"rring now more 'iurticularlv to the 1 designates the valve-housing having the spaced velvc-seats 2, disposed one above the other, for the doublc-scnting valve 'lhis valve is reduced intcrmediatel} of iis seals (1 and I) or channeled, so that said seats operate only to close the escape-ways. Said valve is provided above its upper sent with an extension 4, Working in the upper portion or extension of the valve-housing, said extension 4: being cored or channeled to form guidc-rihs 6, that serve to guide the valve in its movement. ltxtendmg irorn the housing, lTil erniediately of the spa iliercol,

housing 19 by Patented Jan. 1, 1907. in). 247,883.

is a threaded connection 7, and

extending a from the lover end of said lmusing is a thread ed connection (5, the inner closed bye diaphragm or partition 9, in which an inlet-opening it) is lori'rii-d. This diaphragm is formed centrally with 21v boss 11, with. which. a boss 12 of the lou'er end of the valve contacts when the valve is 'unscatcd, the boss ll acting as a stop to limit the downward inovei'nent of the valve. 1

The extension 5 of the valve-housing is formed about its circumference with a pinralityof air-inlets l3 and upon its upper end with. a central threaded stem 11+. 7

15 designates a rep having: about its'circnd of Which. is

cuinfercnce a plurality of openings 28, said cap being formed in its upper wall with. a central opening 17, whereby it may be fitted loosely upon the stem l4, so that it ma} heswung about the valvc-housing to bring said openings 16 into or out of line with the airinlots l3,- avnd thus open or close the latter. A nut 18 on said stem provided to hold the cap in its adjusted position.

in l 3 and 4;, It) indies chest and 20 the cylinder of t simple engine of the piston-valve type. In adapting my invention to the engine two valves are einployed, shown in Fig. 4. the threaded connection 7 is co 'ulected by a suitable pipe 21 with the stoma-passage 22, leading from the steam-chest or valve-h 1sing to the cylinder 20, and the threaded connection is with the steshhehest or valve a suitable pipe 24. The valves are held to their seats by live steam from coin'icction R, which steam is under con.- trol of the throttle. As soon as said steam is shut off the valves will unseat, and if the cap is adjusted so that the air-inlets are open air lTOIH- tlie, atuiosphere will be drawn into the qvlindcr through connection 8 and into the stemnchest through connection 7, the air in the latter case passion around the lower seat of the valve and through opening or port lo the valve when iinscated being held from.

closing this port by the bosses ll and 12. By adjuiuig the cap to close the air-inlet parts,

111 each valve sage of the cylinder. to

boss 28 projects to coact with boss 120i the valve. The connection 8 extends laterally from the lower portion of the housing. In

Fig. 8, 29 designates a steam-chest and 30 the cylinder of a simple engine of the D--sli(levalve type to which. my, valve is applied. Connection 7 is connected with the steamchest and connection 8 with the steam-pas- The valves are held to their seats by the live steam in the steamchest and when the supply is cut off the valvesunseat, If theaininlets are open, air

' passes through connection 7 tothe chest and throughconnections 8 to the cylinder. By closing the caps the valves act as hy-pass valves. In both arrangements, Fig. 3 and 8, the valves communicate with the cylinder and chest at or near the respective ends of the'latter.

From the above description it will be seen that I have provided a very simple construction of valve't'or admitting air to the, cylinder and steam-chest of a simple engine, the valve being held to its seat by live steam, so as to insure perfect seating. There is no pulsating of the valve, thus preventing unneceswhat I claimas new, and desire to secure by Letters Patent of the United States, is-

1. A combined compression and vacuum relief-valve, comprising a casing, a valve movable thereinhaviug spaced seats, a communication between the casing intermediately of said seats and the steam-chest, a communication between thecasing atone end of the valve and the cylinder, and a communication between the casing at the opposite end of the valve andthe atmosphere.

A combination. compression and vacuu1n relief-valve comprising-a casing, air-inlets formed therein, communications between "the .casing and the steam-chest and cylinder of an engine, a valve controlling communicate tion between said. communications and the inlet of air thereto, and a cap adjustable oIisaid casing for varying the size of'or entirely' closing said air-inlets.

A combined compression and vacuum relief-valvecomprising a casing having airinlet portsat one end, a valve'movable-therein having spaced seats, acommunication be tween the casing intermediately ofsaid seats and the steam-chests, a-communication between the casing at one'endof the valve-and the cylinder, and means for varying the-size ofor entirely closing, the air-inlet ports.

In testimony whereof I afliir my signature inthe presence of two witnesses.

EUGENE 7B,. WHELAN.

Witnesses:

WM. C. BOLM, F. W. BALTHASAR. 

